Trolley-pole.



UNITED STATES PATENT OFFICE.

CHARLES A. BRAY AND FLORIEN C. FRY, OF SCHENECTADY, NEW YORK, ASSIGNORS TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

SPECIFICATION forming part of Letters Patent No. 725,667, datednprn 21, 1903.

Application filed September 17, 1902. Serial No. 123.671. (No model.)

and broad. This is especially true of coal-- mines, where the coal-chambers are o f a depth equal to the thickness of the coal-seam, which may be quite small, the chambers, however, being quite wide.

The object of our invention is the construction of a trolley-pole which will adjust itself to contact either with a conductor above the vehicle carrying the trolley or one at the side of the vehicle 'and at a level with or below the top of the vehicle.

Our invention consists in certain features, which will be more fully pointed out in the claims.

In the drawings, Figure l is a side view of a mining-locomotive provided with a trolleypole embodying our invention. Fig. 2 is a partial end view of the same construction.

A mining-locomotive l is conventionally shown as resting on the rails 2, a trolley-pole 3 being revolubly mounted on the locomotivev at the rear end in the usual manner. The trolley-pole is made in sectionsof which the first section 4, preferably made out of wood, is clamped in a socket 5, which is pivoted to the trolley-base 6. The other section 7 ,which is preferably made of metal tubing, has a straight portion 8, which receives the end of the lower section 4. Another portion 9 of this section, which is substantially parallel to the portion S and to section 4, is connected to the portion 8 by an intervening angular portion 10. At the outer end of the section '7 the trolley-wheel holder ll is clamped. The trolley-Wheel 12 is mounted in the holder in the usual manner and engages with the conductor 13.

The-trolley-pole when in the position indicated by the dotted lines inu Figs. 1 and 2 is adapted to engage the conductor above the locomotive in the ordinary manner; but when in the position shown in full lines it may engage the conductor carried at one side of the vehicle and at a level with or lower than the top of the vehicle. A trolley-pole thus constructed will, by its engagement Withy the conductor, automatically shift its position from that shown in the dotted-line construction to that shown in the full-line construction, and of course will follow a conductor in any intermediate position.

By properly proportioning the parts the pole can be used to contact with a wire which is at aY level considerably lower than that of the top of the car. The vertical displacement of the trolley-wheel 12 with respect to the pole-section t may be varied somewhat, if desired, by rotating the pole with respect to the socket-pieces l1 and 5. In place of the simple trolley-wheel holder 11 shown a trolley-wheel holder provided with a swivel joint may be used, so that the plane of the trolley-wheel will always be parallel to the conductor. In practice, however, we have foundthat the slight angular displacement of the trolley-wheel with respect to the conductor is unimportant.

While we have illustrated and described the best form of our invention which is now known, we do not desire to be limited to the at one end and carrying a trolley-wheel ab be below the top of the trolley-Wheel and the 1o the other, the pole being bent, intermediate supporting end.

its ends so that a, pornion of the pole may be In Witness whereof we have hereunto set below the top of the trolley-Wheel and the our hands this 15th day of September, 1902. supportingr end. CHARLES A. BRAY.

x 3. A trolley-pole adapted to be supported l L FLORIEN C. FRY. at; oneY end and carrying a trolley-Wheel ai; the other, the pole being shaped intermediate its ends so that; a, portion ofthe pole may Witnesses:

HELEN ORFORD, E. C. HOLLISTER. 

